My previous email was incorrect about "-wait_for_tc 1". The 2 commands used were:
(1) ffmpeg -loglevel trace -timecode_format rp188any -wait_for_tc 1 -f decklink -probesize 15M -analyzeduration 5M -i "DeckLink Quad (1)" -t 30 -preset veryfast output.mov (2) ffmpeg -loglevel trace -timecode_format rp188any -wait_for_tc 1 -f decklink -i "DeckLink Quad (1)" -t 30 -preset veryfast output.mov The second command is the one that produced 1 frame offset in 3 of the captures. The first command had 0 frames offset for all files tried. On Wed, Nov 13, 2019 at 6:30 PM Ilinca Tudose <ilin...@google.com> wrote: > Hi, > > We tested this with several types of tapes. The results are as follows: > > Out of 58 captures on Betacam tapes 55 had 0 frame offset and 3 had an > offset of 1 frame. All 3 were captured using the flag "-wait_for_tc 1". > Out of the 58 captures roughly half were captured with and half without > "-wait_for_tc > 1". > > Out of 26 HDCAM captures (50/50 with/without "-wait_for_tc 1") all 26 had > 0 TC offset. > > Let me know if there's any questions re testing. The testing setup is the > same as previously mentioned. > > Thanks, > ilinca > > On Wed, Nov 13, 2019 at 5:40 PM Gyan <ffm...@gyani.pro> wrote: > >> As suggested in the review of an earlier patch*, this one drops frames >> till a TC is seen. >> >> Testing results to follow. >> >> Thanks, >> Gyan >> >> *https://patchwork.ffmpeg.org/patch/14081/ >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org >> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> >> To unsubscribe, visit link above, or email >> ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > > > > -- --- Ilinca Tudose | Technical Solutions Consultant, Digitization Operations | go/digitops <https://goto.google.com/digitops> Google Germany GmbH Erika-Mann-Str. 33 80636 München Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg Geschäftsführer: Paul Manicle, Halimah DeLaine Prado Diese E-Mail ist vertraulich. Wenn Sie nicht der richtige Adressat sind, leiten Sie diese bitte nicht weiter, informieren Sie den Absender und löschen Sie die E-Mail und alle Anhänge. Vielen Dank. This e-mail is confidential. If you are not the right addressee please do not forward it, please inform the sender, and please erase this e-mail including any attachments. Thanks. Der Inhalt dieser E-Mail spiegelt den derzeitigen Stand der Verhandlungen wider und dient als Basis für weitere Gespräche. Er soll keine rechtlich verbindliche Verpflichtung begründen. Eine solche Verpflichtung wird allein durch einen zwischen allen beteiligten Parteien abgeschlossenen, schriftlichen Vertrag geschaffen. The above terms reflect a potential business arrangement, are provided solely as a basis for further discussion, and are not intended to be and do not constitute a legally binding obligation. No legally binding obligations will be created, implied, or inferred until an agreement in final form is executed in writing by all parties involved. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
